MFC 更改按钮文字颜色

成员变量关联：

private:
    CMFCButton m_btnColorTest;
    CMFCButton* m_pBtnColor;

// CMFCAppColorDlg 对话框


#define DELETE(ptr) do{if (ptr) {delete ptr; ptr = nullptr;}}while(0)


CMFCAppColorDlg::CMFCAppColorDlg(CWnd* pParent /*=nullptr*/)
    : CDialogEx(IDD_MFCAPPCOLOR_DIALOG, pParent)
{
    m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
    m_pBtnColor = new CMFCButton;   // 堆上的对象放在构造函数中初始化，保证 DDX_Control 时对象已经被创建，
                                    // 放 OnInitDialog() 中不行，滞后于 DDX_Control 了，会有问题。
}

CMFCAppColorDlg::~CMFCAppColorDlg()
{
    DELETE(m_pBtnColor);
}

void CMFCAppColorDlg::DoDataExchange(CDataExchange* pDX)
{
    CDialogEx::DoDataExchange(pDX);
    DDX_Control(pDX, IDC_BUTTON1, m_btnColorTest); // 关联变量
    DDX_Control(pDX, IDC_BUTTON2, *m_pBtnColor);  // 关联变量
}

BEGIN_MESSAGE_MAP(CMFCAppColorDlg, CDialogEx)
    ON_WM_SYSCOMMAND()
    ON_WM_PAINT()
    ON_WM_QUERYDRAGICON()
    ON_BN_CLICKED(IDC_BUTTON1, &CMFCAppColorDlg::OnBnClickedButton1)
    ON_BN_CLICKED(IDC_BUTTON2, &CMFCAppColorDlg::OnBnClickedButton2)
END_MESSAGE_MAP()

按钮事件：

void CMFCAppColorDlg::OnBnClickedButton1()
{
    m_pBtnColor->SetTextColor(RGB(255, 0, 0));
    Invalidate();   // MFC刷新界面
}


void CMFCAppColorDlg::OnBnClickedButton2()
{
    m_pBtnColor->SetTextColor(RGB(0, 0, 0));
    Invalidate(); // // MFC刷新界面
}